Lots of good information kcpaz, but I'm specifically looking for Suby info - a 2WD converted suby gearbox is still cheaper than an Audi/Boxster gearbox and an adapter, and with no weird clutch issues to deal with. Axles are easy and cheap to have made.
So, can clutches be interchanged amongst different gearboxes? Halfshafts? And which years/models came with hydro setups?